[Intro: The Gregory Brothers]
Human voices don't sing pure tones
They're stacked with many frequencies
These natural resonating overtones
Sound like a single pitch to human ears

[Verse: Tom Scott]
I spent hours trying to understand (trying to understand)
How pitch correction actually works (actually works)
But my degree's in linguistics, and I wasn't prepared (prepared, prepared, prepared)
For equations that were this berserk (berserk, berserk, berserk)
The sеcret is math (math) called a Fourier transform (transform)
It takеs the frequencies that were intertwined (-twined, -twined)
Splits them up, identifies them, isolates them (isolates, isolates them)
Then software can change them live, in real time (time, time)

[Outro: The Gregory Brothers, Tom Scott]
The newest software can change different notes inside a chord
You can tune pianos, guitars or choirs
To me, it's so advanced, it might as well be magic (magic, magic)
But it can't write a song, some talent's still required
Oh yeah, some talent's still required!